Specifications include, but are not limited to: A. The Contractor shall provide all labor, material, repair parts, emergency repair and preventative maintenance required to maintain the hydraulic elevators and their respective equipment components in accordance with the original manufacturer's design specifications, operational efficiencies, and capacities. B. Owner reserves the right to add and/or delete (with 30-day notice) equipment as may be required during the contract period at negotiated rates through contract modifications. C. Maximum allowable response time for any given elevator is 24 hours from the time the call for service is placed. The maximum allowable down time for any given elevator is 24 hours. The owner understands there may be concessions due to parts availability, etc., and those incidents will be handled individually.